La Crosse Technology S74870 User manual
1. Insert 2-AA batteries into your Outdoor Sensor.
2. Insert 3-AA batteries Into your Atomic Clock.
3. Enter the Settings Menu to adjust your time and date.
4. Once the sensor is reading to your clock, place the senor outside in a
shaded location. View our sensor mounting video here:
bit.ly/th_sensor_mounting
• The clock will search for the Atomic Time Signal at power up and at UTC
7:00, 8:00, 9:00, 10:00, and 11:00.
• The Atomic Time Signal Icon will flash while searching and be solid
when it has connected.
• From the normal time display, press the SEARCH button to manually start
or stop a search for the WWVB time signal. For information about WWVB
visit: bit.ly/AtomicTime 2
Atomic Clock
S74870
AA
AA
Outdoor Sensor
TX141-Bv4
AA
AA
AA
POWER UP
ATOMIC TIME
1. Hold the SET button to enter the Settings Menu.
2. Use the +/- buttons to adjust values.
3. Press SET to confirm values.
4. Press the SNOOZE button at any time to save and exit.
Settings Menu Order:
• Beep ON/OFF
• Atomic ON/OFF
• DST AUTOMATIC/ DST ALWAYS OFF / DST ALWAYS ON
(Change Spring/Fall) (Standard Time all year) (DST all year)
• Time Zone
• Hour
• Minutes
• Year
• Month
• Date
• Temperature Fahrenheit/Celsius
Notes:
• If Atomic OFF is selected, menu will skip DST and Time Zone settings and
move straight to the Hour setting.
• Weekday sets automatically when Year, Month and Date are set.
TIME ZONE
ATLANTIC
EASTERN
CENTRAL
MOUNTAIN
PACIFIC
ALASKA
HAWAII
3
SETTINGS MENU
4
Press the MOON button to switch between Calendar or Moon Phase.
Your clock will stay on the selection.
• The moon phase is based on
the Lunar Calendar and the year,
month, and date settings.
• Due to character limitations on
the clock; Large and Small Waxing
and Waning Phases will not state
Large or Small.
New Moon
NEW MOON
Small Waxing
Crescent
WAXING CRES
First Quarter
FIRST QTR
Small Waxing
Gibbous
WAXING GIBB
Large Waxing
Gibbous
WAXING GIBB
Full Moon
FULL MOON
Large Waning
Gibbous
WANING GIBB
Small Waning
Gibbous
WANING GIBB
Last Quarter
LAST QTR
Large Waning
Crescent
WANING CRES
Small Waning
Crescent
WANING CRES
Large Waxing
Crescent
WAXING CRES
Phase / Clock Reads Phase / Clock Reads Phase / Clock Reads
CUSTOM DISPLAY
MOON PHASE
Set Alarm:
1. Hold the ALARM button to enter Alarm Settings.
2. Use the +/- buttons to adjust values.
3. Press the ALARM button to confirm and move to next item.
5
Silence a sounding alarm: Press any button except SNOOZE to silence the
alarm for 24 hours.
Activate/Deactivate Alarm:
• Press the ALARM button to activate or deactivate the alarm.
• The Alarm Icon will show when alarm is active.
Snooze:
• When the alarm sounds, press the SNOOZE button to silence
the alarm for 10 minutes. Zz will show.
Note: The alarm will sound with increasing frequency for two minutes,
then shut off automatically if not silenced.
TIME ALARM
6
View: Press the + button to view Outdoor, then Indoor Temperature HI and
LO Records with time and date stamps.
Reset: While viewing individual records, hold the - button to reset to current
temperatures.
Both the Indoor and Outdoor temperature have Trend Arrows to indicate
temperature changes (2°F / 1°C) over the past one hour period.
Temperature has risen over the past hour.
Temperature has been steady over the past hour.
Temperature has fallen over the past hour.
HI/LO TEMPERATURE RECORDS
TEMPERATURE TREND ARROWS
7
If you are seeing NO or dashes for your outdoor readings, please try the
following steps:
1. Hold the SEARCH button to search for your outdoor sensor. The
Reception Indicator will begin to animate.
2. If after 3 minutes the sensor still isn’t connected, bring the sensor inside
next to the display and remove power from both the sensor and clock.
3. Press any button on the clock 20 times and leave the parts sit for a few
moments with the power o.
4. Install a new set of alkaline batteries into the sensor, then into your clock.
For additional help visit: bit.ly/basic_restart
5. If your outdoor data is still not appearing after these steps, please
contact our support sta via the links below.
If you require additional support, get in touch with our friendly customer
support team based in La Crosse, WI. Our knowledgable customer support
team is available: Mon-Fri 8am-6pm CST
Phone: 1.608.782.1610
Email: bit.ly/contact_techsupport
Self Help: bit.ly/s74870_support
SEARCH FOR OUTDOOR SENSOR
WE’RE HERE TO HELP
8
Follow La Crosse Technology on YouTube,
Twitter, Facebook and Instgram.
Ask questions, watch setup videos, and
provide feedback on our social media outlets.
By the Time, replace clock batteries.
By the Outdoor Temperature, replace
sensor batteries.
Atomic Clock (S74870)
Temperature Range:
32°F to 122°F (0°C to 50°C)
Power Requirements:
3-AA, IEC, LR6 batteries (not included)
Dimensions:
12.19” W x 1.59” D x 11.80” H
(30.96 W x 4.04 D x 29.98 H cm)
Outdoor Sensor (TX141-Bv4)
Temperature Range:
-40°F to 140°F (-40°C to 60°C)
Transmission Range:
Over 330 ft. open air
(100 meters) RF 433MHz
Update Interval:
About every 51 seconds
Power:
2-AA, IEC, LR6 batteries (not included)
Battery Life:
Over 12 months
Dimensions:
1.57” L x 0.79” W x 5.12” H
(4.0cm L x 2.0cm W x 13.0 H cm)
Designed in La Crosse, Wisconsin •Made in China •Printed in China •DC 021722
La Crosse Technology, Ltd. provides a 1-year
limited time warranty (from date of purchase)
on this product relating to manufacturing
defects in materials & workmanship.
La Crosse Technology, Ltd,
2830 S. 26th St.
La Crosse, WI 54601
For Full Warranty Details, Visit:
www.lacrossetechnology.com/pages/warranty
STAY IN TOUCH SPECIFICATIONS
LOW BATTERY INDICATOR
WARRANTY
9
This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is
no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by
turning the equipment o and on, the user is encouraged to
try to correct the interference by one or more of the following
measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and
receiver.
Connect the equipment into an outlet on a circuit dierent
from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician
for help.
This device complies with Part 15 of the FCC Rules. Operation
is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received,
including interference that may cause undesired operation.
Caution!
Any changes or modifications not expressly approved by
the party responsible for compliance could void the user’s
authority to operate the equipment.
All rights reserved. This manual may not be reproduced
in any form, even in part, or duplicated or processed using
electronic, mechanical or chemical process without the
written permission of the publisher.
This booklet may contain errors or misprints. The information
it contains is regularly checked and corrections are included
in subsequent editions. We disclaim any responsibility for
any technical error or printing error, or their consequences.
All trademarks and patents are recognized.
Battery Replacement Instructions
When batteries of dierent brand or type are used
together, or new and old batteries are used together,
some batteries may be over-discharged due to a
dierence of voltage or capacity. This can result
in venting, leakage, and rupture and may cause
personal injury.
•Always purchase the correct size and grade of
battery most suitable for the intended use.
•Always replace the whole set of batteries at one
time, taking care not to mix old and new ones, or
batteries of dierent types.
•Clean the battery contacts and also those of the
device prior to battery installation.
•Ensure the batteries are installed correctly with
regard to polarity (+ and -).
•Remove batteries from product during periods of
non-use. Battery leakage can cause corrosion and
damage to this product.
•Remove used batteries promptly.
•For recycling and disposal of batteries, and
to protect the environment, please check the
internet or your local phone directory for local
recycling centers and/or follow local government
regulations.
CARE AND MAINTENANCE FCC STATEMENT
CALIFORNIA RESIDENTS
This product can expose you to chemicals including
acrylonitrile, butadiene, and styrene, which are known to the
State of California to cause cancer and birth defects or other
reproductive harm.
For more information, go to: www.P65Warnings.ca.gov
CA WARNING:
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